https://djl-analysis.deepsymmetry.org/rekordbox-export-analy... (and playlist entry rows) should have a complete enough description if someone wants to give it a try
The Rekordbox.xml format [1] is quite simple. Note the `<TEMPO>` and `<POSITION_MARK>` tags.
But Pinoeer can be weird and there's a lot of old (even ancient) equipment out there, so sometimes it's a case of finding the lowest common denominator and sticking to that.
[1]: https://cdn.rekordbox.com/files/20200410160904/xml_format_li...